Support for transmission lines



Dec. 2. 1930. A. o. AUSTIN SUPPORT FOR TRANSMISSION LINES Filed May 251925 JNVENTOR. 6124;;

A TTORNEYLS' Patented Dec. 2, 1930 UNITED STA ES PATENT OFFICE ARTHUR O.AUSTIN, OF BARBEIRTON, OHIO, A SSIGNOR, BY MESNE ASSIGNMENTS, TO THEOHIO BRASS COMPANY, OF MANSFIELD, OHIO, A CORPORATION OF NEW JERSEYSUPPORT FOR TRANSMISSION LINES Application filed May 25,

This inventionrelates to supports for high potential transmission linesand the relation of the line to the supporting structure, provisionbeing made to minimize the tendency to flash-over between the line andsuport. p The object of the invention is to provide means'forcontrolling the electrostatic field about the transmission line incidentto the supporting structure so as to reduce the tendency to dischargebetween the line and suport. P .The'invention is exemplified in thecombination and arrangement of parts shown in the accompanying drawingand described in the following specification and it is more particularlypointed out in the appended claims.

In the drawing Fig. 1 is an elevation of the upper portion of a skeletonsteel tower having the present invention applied thereto.

Fig. 2 is a top plan view of the parts shown in Fig. l.

Fig. 3 is a side elevation of the upper left hand insulator supportshown in Fig. 1.

Figs. 1, 5, and 6 are elevations respectively of the insulator sup ortson the various crossarms opposite of w ich these figures are located onthe drawing.

The supporting tower is made up of a lower or base portion havingdiverging legs 10 connected together by suitable braces. Above thediverging legs 10 or vertical u rights 11 which continue upwardl from t0 legs 10 and which constitute attac ent portion commonly called thebasket. The uprights 11 are suitably placed in any approved manner asillustrated in the drawin Cross- -basket extends substantia ly in thedirection of the length of the line while the other di- -agonal of thesquare is arranged transversely to the len h of the transmission line.

Since t e field about the conductor is set up by the presence of thetower, the relation 1925. Serial No. 32,713.

of the tower structure to the conductors of the transmission lines is animportant factor in the problem of discharge from the conductors to thetower. Where the portion of the tower adjacent to the transmlssion lineextends for a considerable distance in the direction of the line, theinfluence on the field about the line will afiect the line for aconsiderable distance along the length thereof. It has been found thatthe tendency to discharge due to the presence of the field incident tothe tower may be greatly reduced by the use of insulated flux controlsor conductor cages described in my prior Patents Nos. 1,521,743, January6, 1925; 1,552,664, September 8, 1925; 1,611,871, December 28, 1926; and1,664,100 March 27, 1928.

If the tower has a portion adjacent the line of considerable width inthe direction of the line as such towers have heretofore been arranged,the protective device for preventing discharge in order to be efiectivemust ex- 1tend for a considerable distance along the In the presentinvention, the tower'is arranged, however, so as to have a minimumextent in the direction of the line where the tower approaches closestto the line. This will be apparent from Fig. 2 of the drawing from whichit will be seen that because of the diagonal position of the cross-arms,the portion of the tower most closely adjacent the line is mostrestricted, in the direction of the length of the line. This arrangementconfines the field incident to the tower to such an extent along theline that it may be eifectively controlled by insulated flux controls orconductor cages. This may be accomplished by insulated flux controlmembers 15 secured to the transmission line 16 as shown at the upperleft hand portion of Fig. 1 of the drawing. The transmission line isthere illustrated as supported from the cross-arm 14 by a string ofsusension insulators 17. The line 18 suspended y insulators 19 at the righthand end of the cross-arm 14 is provided with flux control horns 20having their ends covered with insulators 21. In addition to the horns20, conductor cages 22 maybe for a short distance in either directionfrom the tower. The conductors 23 suspended from the opposite ends ofthe cross-arm 13 is provided with four flux control horns 24 as shown inFig. 5 and the central portion of Fig. .1. In connection with thelowermost conductor 25, the outer horns are omitted and only a singlepair of horns 26, extending inwardly toward the tower are employed.

' It will be understood that other arrangements of flux control membersmay be substituted without departing from the spirit and scope of theinvention as set forth in the following claims.

1. The combination with a transmission line of a support for saigl linewhich is quadrilateral in cross section, said line being disposed at oneside of said support and extending substantially normal to the planedetermined by one pair of diagonally opposite longitudinal extendingcorners of said support.

2. The combination with a transmission line of a skeleton support forsaid line which is quadrilateral in cross section, said line beingdisposed outside of said support and extending transversely tothe'direction of the plane of one diagonal of said support and fluxcontrol means connected with said line to overcome the tendency todischarge incident to the field occasioned by said support.

3. The combination with a pair of transmission lines of a supportsubstantially rectangular in cross section disposed between said linesand arranged with one diagonal plane thereof disposed transversely tothe direction of said lines.

4. The combination with a pair of spaced transmission lines ofa-supporting structure for said lines which is quadrilateral in crosssection and a cross-arm arranged in the direction of the diagonal ofsaid supporting structure and having said lines carried thereby andextending in a direction substantially normal to said cross arm. 7

5. The combination with a skeleton support which is rectangular in crosssection of a cross-arm extending transversely of said supportsubstantially in the direction of the diagonal thereof, transmissionlines mounted on said cross-arm. atopposite sides of said support andflux controlmembers connected with said transmission lines to preventdischarge between said transmission lines and support.

6. The combination with a skeleton tower having four upri ht supportsarranged substantially in the orm of asquare of a crossaI'm disposeddiagonally of said square, a transmission line supported on saidcrossarm outside of said tower and extending sub-- stantially normal tosaid cross arm and a flux control member connected with said trans-IIllSSlOIl l nes ad acent said cross-armwhich is substantially square incross-section and a cross-arm carried by said basket and extendingsubstantially in the-direction of the diagonal of said square,suspension i11- sulators supported by said cross-arm at one side of saidbasket, a transmission line supported by said insulators and extendingsubstantially normal to said cross arm and outside of said basket, aflux control device con nected with said transmission line substantiallyin registration with the portion of said basket closest to saidtransmission line and conductor cages extending along said transmissionline away from said basket.

8. The combination with a transmission line, 'of a skeleton support forsaid line which is quadrilateral in cross sect-ion, said line beingdisposed outside of said support and extending substantially normal tothe direction of the plane of one diagonal of said support.

9. The combination with a skeleton support which is rectangular in crosssection, of a cross arm extending transversely of said supportsubstantially in the direction of the diagonal thereof and projectingbeyond said support at opposite corners thereof, and

transmission lines mounted on said cross arm outside of said support andat opposite sides of said support.

10. The combination with a skeleton tower having four upright supportsarranged substantially in the form of a square, of cross arms disposeddiagonally of said square, and

transmission lines outside of said tower supported on said cross armsand extending substantially normal-t0 said cross arms.

11. The combination with a skeleton tower having uprights forming asupporting basket which is substantially square in cross section, across arm carried by said basket and extending substantially in thedirection of the diagonal of said square, suspension insulatorssupported by said cross arm at one side of said basket, and atransmission line supported by said insulator and extending;

substantially normal to said cross arm outside of said basket.

12. The combination with a transmission line, ofa skeleton towercomprising four upright posts positioned at four corners of said tower,said line being supported by said tower outside of the space enclosed bysaid posts, the plane determined by two of said posts beingsubstantially parallel with the direction of said line while the planedeter mined by the other two of said posts is sub- J stantially normalto the direction of said line.

13. A support for a transmission line comprising two upright postsspaced apart at their bottom and disposed in a vertical plane, a crossarm attached to said posts substantially within the plane determined bysaid May, A, D. 1925.

weenie posts, a transmission line carried by said cross arm beyond thespace between said posts and substantially normal to the planedetermined by said posts, and an additional pair of posts disposed atopposite sides of said plane respectively, and connected with said firstnamed posts and forming with said first named posts a quadrilateraltower for supporting said transmission line. I

14:- A transmission line support comprising four uprightposts forming arectangular tower, two of said posts disposed at diagonally oppositecorners of said tower determining'a vertical plane, a cross arm securedto said posts and projecting beyond said tower, and a transmission linecarried by said cross arm outside of said tower and disposedsubstantially normal to said vertical plane.

In testimony whereof I have signed my name to this specification on this21st day of ARTHUR O. AUSTIN.

